ProductController_v1.cs

public class ProductController 
{
    [HttPost]
    public ActionResult Create([FromBody] Product model) 
    {    
        using(var dbContext = new ProductContext()) 
        {
            dbContext.Products.Add(model);
            dbContext.SaveChanges();
        }
        return View();
    }
    
    [HttpDelete("{id}")]
    public ActionResult Delete(int? productId) 
    {
        if (!productId.HasValue) {
            ViewBag["Error"] = "Product Id must be specified.";
            return View();
        }
            
        using(var dbContext = new ProductContext()) 
        {
            var product = dbContext.Where(x => x.Id == productId.Value).SingleOrDefault();
            if (product == null) {
                ViewBag["Error"] = $"Product could not be found, product id {productId.Value}";
                return View();
            }
            
            dbContext.Add(product);
            dbContext.SaveChanges();
        }
        return View();
    }
}